Softened butter mix with sugar. Add egg yolks, one by one. Gradually puts and milk, alternating with the flour, which is sifted with baking powder. Poppy seed is poured a little water, then drain and mix with vanilla, all put into the dough. The three egg whites are broken down into the snow and add to cake mixes. When everything is well mixed, pour into greased and floured cake form and bake in preheated oven at 180 ° C